<template>
  <div>
    <div v-clickoutside="hideReplyBtn" @click="inputFocus" class="my-reply">
      <!-- 头像 -->
      <el-avatar class="header-img" :size="40" :src="myHeader"></el-avatar>
      <!-- 评论框 -->
      <div class="reply-info">
        <div
          tabindex="0"
          contenteditable="true"
          id="replyInput"
          ref="replyInput"
          spellcheck="false"
          placeholder="输入评论..."
          class="reply-input"
          @focus="showReplyBtn"
          @input="onDivInput($event)"
        ></div>
      </div>
      <!-- 发表评论的按钮 -->
      <div class="reply-btn-box" v-show="btnShow">
        <el-button
          class="reply-btn"
          size="medium"
          @click="sendComment"
          type="primary"
          >发表评论</el-button
        >
      </div>
    </div>
    <div
      v-for="(item, i) in comments"
      :key="i"
      class="author-title reply-father"
    >
      <el-avatar class="header-img" :size="40" :src="item.headImg"></el-avatar>
      <!-- 昵称,时间 -->
      <div class="author-info">
        <span class="author-name">{{ item.name }}</span>
        <span class="author-time">{{ item.time }}</span>
      </div>
      <!-- 评论数,点赞 -->
      <div class="icon-btn">
        <span @click="showReplyInput(i, item.name, item.id)"
          ><i class="iconfont comments"></i>{{ item.commentNum }}</span
        >
        <i class="iconfont like"></i>{{ item.like }}
      </div>
      <div class="talk-box">
        <!-- 评论内容 -->
        <p>
          <span class="reply">{{ item.comment }}</span>
        </p>
      </div>
      <div class="reply-box">
        <div v-for="(reply, j) in item.reply" :key="j" class="author-title">
          <el-avatar
            class="header-img"
            :size="40"
            :src="reply.fromHeadImg"
          ></el-avatar>
          <!-- 回复评论昵称，时间 -->
          <div class="author-info">
            <span class="author-name">{{ reply.from }}</span>
            <span class="author-time">{{ reply.time }}</span>
          </div>
          <!-- 回复评论数,点赞 -->
          <div class="icon-btn">
            <span @click="showReplyInput(i, reply.from, reply.id)"
              ><i class="iconfont comments"></i>{{ reply.commentNum }}</span
            >
            <i class="iconfont like"></i>{{ reply.like }}
          </div>
          <div class="talk-box">
            <p>
              <!-- 回复谁（昵称） -->
              <span>回复 {{ reply.to }}：</span>
              <!-- 回复评论内容 -->
              <span class="reply">{{ reply.comment }}</span>
            </p>
          </div>
          <div class="reply-box"></div>
        </div>
      </div>
      <!-- 回复评论 -->
      <div v-show="_inputShow(i)" class="my-reply my-comment-reply">
        <el-avatar class="header-img" :size="40" :src="myHeader"></el-avatar>
        <div class="reply-info">
          <div
            tabindex="0"
            contenteditable="true"
            spellcheck="false"
            placeholder="输入评论..."
            @input="onDivInput($event)"
            class="reply-input reply-comment-input"
          ></div>
        </div>
        <div class="reply-btn-box">
          <el-button
            class="reply-btn"
            size="medium"
            @click="sendCommentReply(i, j)"
            type="primary"
            >发表评论</el-button
          >
        </div>
      </div>
    </div>
  </div>
</template>


<script>
const clickoutside = {
  // 初始化指令
  bind(el, binding, vnode) {
    function documentHandler(e) {
      // 这里判断点击的元素是否是本身，是本身，则返回
      if (el.contains(e.target)) {
        return false;
      }
      // 判断指令中是否绑定了函数
      if (binding.expression) {
        // 如果绑定了函数 则调用那个函数，此处binding.value就是handleClose方法
        binding.value(e);
      }
    }
    // 给当前元素绑定个私有变量，方便在unbind中可以解除事件监听
    el.vueClickOutside = documentHandler;
    document.addEventListener("click", documentHandler);
  },
  update() {},
  unbind(el, binding) {
    // 解除事件监听
    document.removeEventListener("click", el.vueClickOutside);
    delete el.vueClickOutside;
  },
};
export default {
  name: "Comments",
  data() {
    return {
      btnShow: false, //发表评论按钮显示与隐藏
      index: "0",
      replyComment: "",
      myName: "Lana Del Rey",
      //  头像
      myHeader:
        "https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg",
      myId: 19870621,
      to: "",
      toId: -1,
      comments: [
        {
          name: "Lana Del Rey",
          id: 19870621,
          headImg:
            "https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg",
          comment: "我发布一张新专辑Norman Fucking Rockwell,大家快来听啊",
          time: "2019年9月16日 18:43",
          commentNum: 2,
          like: 15,
          inputShow: false,
          reply: [
            {
              from: "Taylor Swift",
              fromId: 19891221,
              fromHeadImg:
                "https://ae01.alicdn.com/kf/H94c78935ffa64e7e977544d19ecebf06L.jpg",
              to: "Lana Del Rey",
              toId: 19870621,
              comment: "我很喜欢你的新专辑！！",
              time: "2019年9月16日 18:43",
              commentNum: 1,
              like: 15,
              inputShow: false,
            },
            {
              from: "Ariana Grande",
              fromId: 1123,
              fromHeadImg:
                "https://ae01.alicdn.com/kf/Hf6c0b4a7428b4edf866a9fbab75568e6U.jpg",
              to: "Lana Del Rey",
              toId: 19870621,
              comment: "别忘记宣传我们的合作单曲啊",
              time: "2019年9月16日 18:43",
              commentNum: 0,
              like: 5,
              inputShow: false,
            },
          ],
        },
        {
          name: "Taylor Swift",
          id: 19891221,
          headImg:
            "https://ae01.alicdn.com/kf/H94c78935ffa64e7e977544d19ecebf06L.jpg",
          comment: "我发行了我的新专辑Lover",
          time: "2019年9月16日 18:43",
          commentNum: 1,
          like: 5,
          inputShow: false,
          reply: [
            {
              from: "Lana Del Rey",
              fromId: 19870621,
              fromHeadImg:
                "https://ae01.alicdn.com/kf/Hd60a3f7c06fd47ae85624badd32ce54dv.jpg",
              to: "Taylor Swift",
              toId: 19891221,
              comment: "新专辑和speak now 一样棒！",
              time: "2019年9月16日 18:43",
              commentNum: 25,
              like: 5,
              inputShow: false,
            },
          ],
        },
        {
          name: "Norman Fucking Rockwell",
          id: 20190830,
          headImg:
            "https://ae01.alicdn.com/kf/Hdd856ae4c81545d2b51fa0c209f7aa28Z.jpg",
          comment: "Plz buy Norman Fucking Rockwell on everywhere",
          time: "2019年9月16日 18:43",
          commentNum: 0,
          like: 5,
          inputShow: false,
          reply: [],
        },
      ],
    };
  },
  directives: { clickoutside },
  methods: {
    inputFocus() {
      this.$refs.replyInput.style.padding = "8px 8px";
      this.$refs.replyInput.style.border = "2px solid blue";
      //   获取焦点
      this.$refs.replyInput.focus();
    },
    // 当评论框获取焦点，发表评论按钮显示
    showReplyBtn() {
      this.btnShow = true;
    },
    // 失去焦点，发表评论按钮隐藏
    hideReplyBtn() {
      this.btnShow = false;
      this.$refs.replyInput.style.padding = "10px";
      this.$refs.replyInput.style.border = "none";
    },
    showReplyInput(i, name, id) {
      this.comments[this.index].inputShow = false;
      this.index = i;
      this.comments[i].inputShow = true;
      this.to = name;
      this.toId = id;
    },
    _inputShow(i) {
      return this.comments[i].inputShow;
    },
    sendComment() {
      if (!this.replyComment) {
        this.$message({
          showClose: true,
          type: "warning",
          message: "评论不能为空",
        });
      } else {
        let a = {};
        let input = document.getElementById("replyInput");
        let timeNow = new Date().getTime();
        let time = this.dateStr(timeNow);
        a.name = this.myName;
        a.comment = this.replyComment;
        a.headImg = this.myHeader;
        a.time = time;
        a.commentNum = 0;
        a.like = 0;
        this.comments.push(a);
        this.replyComment = "";
        input.innerHTML = "";
      }
    },
    sendCommentReply(i, j) {
      if (!this.replyComment) {
        this.$message({
          showClose: true,
          type: "warning",
          message: "评论不能为空",
        });
      } else {
        let a = {};
        let timeNow = new Date().getTime();
        let time = this.dateStr(timeNow);
        a.from = this.myName;
        a.to = this.to;
        a.fromHeadImg = this.myHeader;
        a.comment = this.replyComment;
        a.time = time;
        a.commentNum = 0;
        a.like = 0;
        this.comments[i].reply.push(a);
        this.replyComment = "";
        document.getElementsByClassName("reply-comment-input")[i].innerHTML =
          "";
      }
    },
    onDivInput: function (e) {
      this.replyComment = e.target.innerHTML;
    },
    dateStr(date) {
      //获取js 时间戳
      var time = new Date().getTime();
      //去掉 js 时间戳后三位，与php 时间戳保持一致
      time = parseInt((time - date) / 1000);
      //存储转换值
      var s;
      if (time < 60 * 10) {
        //十分钟内
        return "刚刚";
      } else if (time < 60 * 60 && time >= 60 * 10) {
        //超过十分钟少于1小时
        s = Math.floor(time / 60);
        return s + "分钟前";
      } else if (time < 60 * 60 * 24 && time >= 60 * 60) {
        //超过1小时少于24小时
        s = Math.floor(time / 60 / 60);
        return s + "小时前";
      } else if (time < 60 * 60 * 24 * 30 && time >= 60 * 60 * 24) {
        //超过1天少于30天内
        s = Math.floor(time / 60 / 60 / 24);
        return s + "天前";
      } else {
        //超过30天ddd
        var date = new Date(parseInt(date));
        return (
          date.getFullYear() +
          "/" +
          (date.getMonth() + 1) +
          "/" +
          date.getDate()
        );
      }
    },
  },
};
</script>

<style  scoped>
.my-reply {
  padding: 10px;
  background-color: #fafbfc;
}
/* 头像 */
.my-reply .header-img {
  display: inline-block;
  vertical-align: top;
}
/* 评论框 */
.my-reply .reply-info {
  display: inline-block;
  margin-left: 5px;
  width: 90%;
}
@media screen and (max-width: 1200px) {
  .my-reply .reply-info {
    width: 80%;
  }
}
/* 评论内容框 */
.my-reply .reply-info .reply-input {
  min-height: 20px;
  line-height: 22px;
  padding: 10px 10px;
  color: black;
  background-color: #fff;
  border-radius: 5px;
}
.my-reply .reply-info .reply-input:empty:before {
  content: attr(placeholder);
}
.my-reply .reply-info .reply-input:focus:before {
  content: none;
}
/* 评论区获取焦点 */
.my-reply .reply-info .reply-input:focus {
  padding: 8px 8px;
  border: 2px solid #00f;
  box-shadow: none;
  outline: none;
}
/* 发表评论按钮 */
.my-reply .reply-btn-box {
  height: 25px;
  margin: 10px 0;
}
.my-reply .reply-btn-box .reply-btn {
  position: relative;
  float: right;
  margin-right: 15px;
}
/* 回复评论 */
.my-comment-reply {
  margin-left: 50px;
}
.my-comment-reply .reply-input {
  width: flex;
}
/* 分割线 */
.author-title:not(:last-child) {
  border-bottom: 1px solid rgba(178, 186, 194, 0.3);
}
/* 头像处理 */
.author-title {
  padding: 10px;
}
.author-title .header-img {
  display: inline-block;
  vertical-align: top;
}
/* 昵称,时间 */
.author-title .author-info {
  display: inline-block;
  margin-left: 5px;
  width: 60%;
  height: 40px;
  line-height: 20px;
}
.author-title .author-info > span {
  display: block;
  cursor: pointer;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
/* 昵称文字格式 */
.author-title .author-info .author-name {
  color: #000;
  font-size: 18px;
  font-weight: bold;
}
/* 时间文字格式 */
.author-title .author-info .author-time {
  font-size: 14px;
}
/* 评论点赞图标 */
.author-title .icon-btn {
  width: 30%;
  padding: 0 !important;
  float: right;
}
.comments::before {
  /* 想使用的icon的十六制编码，去掉&#x之后的 */
  content: "\e8b9";
  /* 必须加 */
  font-family: "iconfont";
}
.like::before {
  /* 想使用的icon的十六制编码，去掉&#x之后的 */
  content: "\ec7f";
  /* 必须加 */
  font-family: "iconfont";
  font-size: 18px;
  margin-left: 20px;
}
@media screen and (max-width: 1200px) {
  .author-title .icon-btn {
    width: 20%;
    padding: 7px;
  }
}
.author-title .icon-btn i {
  cursor: pointer;
}
.author-title .icon-btn .iconfont {
  margin: 0 5px;
}
/* 评论内容 */
.author-title .talk-box > p {
  margin: 0;
}
/* 评论字体格式 */
.author-title .talk-box .reply {
  font-size: 16px;
  color: #000;
}
.author-title .reply-box {
  margin: 10px 0 0 50px;
  background-color: #efefef;
  /* background-color: skyblue; */
}
</style>